package com.haynes.meetxiaohai.config;


import com.haynes.meetxiaohai.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

/**
 * @author Haines
 */
@Configuration
@Slf4j
public class WebMvcConfig extends WebMvcConfigurationSupport {
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("资源映射开始~");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    /**
     * 拓展MVC消息转换器,将Java对象序列化为JSON对象
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("拓展我们自己的消息转换器....");
//        1.创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter =new MappingJackson2HttpMessageConverter();
//        2.设置对象转换器，底层使用Jackson将Java对象转换为JSON对象
        messageConverter.setObjectMapper(new JacksonObjectMapper());
//        3.将自己创建的对象转换器设置MVC框架的对象转换器集合当中
        converters.add(0,messageConverter);
    }
}
